“VOCALOID” is singing voice synthesis technology and application software that can create artificial singing voices on a computer simply by inputting lyrics and melodies. The VOCALOID keyboard “VKB-100” is a keyboard that allows you to sing lyrics in real time and enjoy playing, realized by this “VOCALOID”. By switching the voice database called “singing voice library” recorded from actual human voices, you can use the voices of various singers. By connecting with a dedicated application for smartphones and tablets via Bluetooth, you can add singers such as “Hatsune Miku” and enter lyrics in advance to enjoy playing original songs. This instrument offers a completely new way of enjoying VOCALOID, allowing anyone to enjoy VOCALOID songs, as it does not require a computer or specialized knowledge of music production.